AP BIOLOGY FIRST SEMESTER EXAM
QUESTIONS WITH CORRECT ANSWER
The peroxisome gets its name from its interaction with hydrogen peroxide. If a liver cell
is detoxifying alcohol and some other poisons, I️t does so by removal of hydrogen from
the molecules. What, then, do the enzymes of the peroxisome do? - Answer-Transfer
the hydrogens to oxygen molecules
How does the cell multiply its peroxisomes? - Answer-The split in two after they are two
large
All of the following serve an important role in determining or maintaining the structure of
plant cells. Which of the following are distinct from the others in their composition?
(Microtubules, microfilaments, plant cell walls, intermediate filaments, and nuclear
lamina - Answer-Plant cell walls
Which of the following contain the 9 + 2 arrangement of microtubules - Answer-Cilia and
flagella (motion)
Microfilaments are well known for their role in which of the following? - Answer-Amoeba
movement, formation of cleavage furrows, contracting of cleavage furrows, and
contracting muscle cells (all of the above)
Plasmodesmata in plant cells are most similar in function to which of the following
structures in animal cells? - Answer-Gap junctions
What makes I️t necessary for animal cells, although they have no cell walls, to have
intercellular junctions? - Answer-Large molecules, especially proteins, do not readily get
though one, much less two adjacent cell membranes
Which structure-function pair is mismatched? - Answer-Microtubules; muscle
contraction
Which of the following types of molecules are the major structural components of the
cell membrane? - Answer-Phospholipids and proteins
The presence of cholesterol in the plasma membranes of some animals... - Answer-
Enables the membrane to stay fluid more easily when cell temperature drops
According to the fluid mosaic model of cell membranes, which of the following is a
TRUE statement about membrane phospholipids - Answer-They can move laterally
along the plane of the membrane
, In order for a protein to be an integral membrane protein I️t would have to be which of
the following? - Answer-Amphipathic
What is a reasonable explanation for why unsaturated fatty acids help to keep any
membrane more fluid at a lower temperature? - Answer-The double bonds form kinks in
the fatty acid tails, forcing adjacent lipids to be further apart
Which is most important for the glycoproteins and glycolipids of animal cell
membranes? - Answer-A cell's ability to distinguish one type of neighboring cell from
another
An animal cell lacking oligiosaccharides on the external surface of its plasma membrane
would likely be impaired in which of the following? - Answer-Cell to cell recognition
What is not embedded in the lipid bilayer at all? - Answer-peripheral proteins
What often serves as receptors or cell recognition molecules on cell surfaces? -
Answer-Glycoproteins
The formulation of a model for a structure or for a process serves which of the following
purposes? - Answer-I️t functions as a testable hypothesis
What kinds of molecules pass through a cell membrane most easily? - Answer-Small
and hydrophobic
What is a characteristic feature of a carrier protein in a plasma membrane? - Answer-I️t
exhibits a specificity for a particular type of molecule
What would likely move through the lipid bilayer of a plasma membrane most rapidly? -
Answer-CO2
What is a compartment that often takes up much of the volume of a plant cell? -
Answer-Vacuole
What is one of the main energy transformers of cells? - Answer-Mitochondrion
Which organelle constrains its own DNA and ribosomes? - Answer-Mitochondrion
What contains enzymes that transfers hydrogen from various substrates to oxygen? -
Answer-Peroxisome
Grand, thylakoids, and stroma are all components found in...? - Answer-Chloroplasts
Which organelle is capable of converting light energy to chemical energy? - Answer-
Chloroplasts
QUESTIONS WITH CORRECT ANSWER
The peroxisome gets its name from its interaction with hydrogen peroxide. If a liver cell
is detoxifying alcohol and some other poisons, I️t does so by removal of hydrogen from
the molecules. What, then, do the enzymes of the peroxisome do? - Answer-Transfer
the hydrogens to oxygen molecules
How does the cell multiply its peroxisomes? - Answer-The split in two after they are two
large
All of the following serve an important role in determining or maintaining the structure of
plant cells. Which of the following are distinct from the others in their composition?
(Microtubules, microfilaments, plant cell walls, intermediate filaments, and nuclear
lamina - Answer-Plant cell walls
Which of the following contain the 9 + 2 arrangement of microtubules - Answer-Cilia and
flagella (motion)
Microfilaments are well known for their role in which of the following? - Answer-Amoeba
movement, formation of cleavage furrows, contracting of cleavage furrows, and
contracting muscle cells (all of the above)
Plasmodesmata in plant cells are most similar in function to which of the following
structures in animal cells? - Answer-Gap junctions
What makes I️t necessary for animal cells, although they have no cell walls, to have
intercellular junctions? - Answer-Large molecules, especially proteins, do not readily get
though one, much less two adjacent cell membranes
Which structure-function pair is mismatched? - Answer-Microtubules; muscle
contraction
Which of the following types of molecules are the major structural components of the
cell membrane? - Answer-Phospholipids and proteins
The presence of cholesterol in the plasma membranes of some animals... - Answer-
Enables the membrane to stay fluid more easily when cell temperature drops
According to the fluid mosaic model of cell membranes, which of the following is a
TRUE statement about membrane phospholipids - Answer-They can move laterally
along the plane of the membrane
, In order for a protein to be an integral membrane protein I️t would have to be which of
the following? - Answer-Amphipathic
What is a reasonable explanation for why unsaturated fatty acids help to keep any
membrane more fluid at a lower temperature? - Answer-The double bonds form kinks in
the fatty acid tails, forcing adjacent lipids to be further apart
Which is most important for the glycoproteins and glycolipids of animal cell
membranes? - Answer-A cell's ability to distinguish one type of neighboring cell from
another
An animal cell lacking oligiosaccharides on the external surface of its plasma membrane
would likely be impaired in which of the following? - Answer-Cell to cell recognition
What is not embedded in the lipid bilayer at all? - Answer-peripheral proteins
What often serves as receptors or cell recognition molecules on cell surfaces? -
Answer-Glycoproteins
The formulation of a model for a structure or for a process serves which of the following
purposes? - Answer-I️t functions as a testable hypothesis
What kinds of molecules pass through a cell membrane most easily? - Answer-Small
and hydrophobic
What is a characteristic feature of a carrier protein in a plasma membrane? - Answer-I️t
exhibits a specificity for a particular type of molecule
What would likely move through the lipid bilayer of a plasma membrane most rapidly? -
Answer-CO2
What is a compartment that often takes up much of the volume of a plant cell? -
Answer-Vacuole
What is one of the main energy transformers of cells? - Answer-Mitochondrion
Which organelle constrains its own DNA and ribosomes? - Answer-Mitochondrion
What contains enzymes that transfers hydrogen from various substrates to oxygen? -
Answer-Peroxisome
Grand, thylakoids, and stroma are all components found in...? - Answer-Chloroplasts
Which organelle is capable of converting light energy to chemical energy? - Answer-
Chloroplasts
